The battery connection idea is a very simple and common “Y-cable” one, but all the connections are hidden inside the battery, so you only need to connect 2 plugs. Do not forget that you MUST equalize voltage of the batteries before joining them. The simplest way to equalize voltages is to fully charge batteries, so their voltages are near 41-42V. The boat battery is equipped with a Xiaomi-compatible round charge plug, so you can easily charge it by your original Xiaomi charger.
The battery is protected by a 15A common port Daly BMS with balancing. There is an extra protection stage by a 15A car fuse, which can be easily replaced.
There are 20 pieces of 21700 cells inside the battery, which provide about 9500-10000 mAh of capacity. Since the original PRO/PRO2 batteries are 12800 mAh, the boat battery grants about 80% extra range. We use high quality branded cells.
The boat battery body is milled of a solid HDPE plastic sheet, which provides great durability. There is also a 1 mm steel sheet inside for extra cells protection.
The battery is “Plug and Play”, just carefully do the following steps:
1. Fully charge the scooter as usual
2. Fully charge the boat battery through the round Xiaomi-compatible port on it
3. Unscrew the original battery cover.
4. Connect the charging mode supressor module. You don’t need to flash the scooter.
5. Connect the boat battery
6. Screw the boat battery
7. Enjoy
The set includes the following parts:
1. Boat battery
2. Long screws
3. Charging mode supressor module
4. Extra 15A car fuse
The set is compatible with Xiaomi PRO/PRO2. The set is not compatible with Xiaomi M365, M187, 1S, Essential, Mi3, 4PRO, 4Ultra.
Xiaomi M365, M187, 1S, Essential, Mi3 version is also available, just check related products below.
Learn more about boat battery operation principle or even DIY your own boat battery, reading the following post:
Mika Hakala –
What can I say? The boat battery was easy to install. Before followed steps 1-7, I disconnected internal battery from the scooter, otherwise I did like adviced. And in the end of the procedure, I plugged the battery to the scooter.
I repalaced also internal battery with new quality battery pack and with these two batteries my M365 Pro is again very fun to ride ????
Thank you Denis!
Hüseyin Güner (verified owner) –
Awesome. The replacement is super easy and the longest “time investment” is taking the screws off and on again. Any small child who has a little understanding of playing bricks can do it. It’s super easy and convenient and most of all i can climb hills before at 12 kph (on the scooter) with now 18-20 kph.
Thank you very much for making the upgrade that accessible.